/Engine/Plugins/Experimental/JWT/Source/JWT/Public/JwtUtils.h
Split an encoded JWT string into the 3 header, payload, and signature parts.
Whether the JWT string could be split
static bool SplitEncodedJsonWebTokenString ( const FStringView InEncodedJsonWebTokenString, FStringView & OutEncodedHeaderPart, FStringView & OutEncodedPayloadPart, FStringView & OutEncodedSignaturePart )